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Assertion: For the coagulation of sols c...

Assertion: For the coagulation of sols carrying positive charge, `PO_(4)^(3-)` ions are more effeciency than `SO_(4)^(2-)` or `Cl^(-)` ions.
Reason: This follows Hardy-Schulze rule.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true and the reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
A
Both assertion and reason are ture and reason is the correct explanation of assertion.According to Hardy-Schulze rule: coagulating power of an electrolyte is directly proportional to the fourth powre of the valency of the ions causing coagulation.
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each question constain STATEMENT-1(Assertion ) and STATEMENT - 2 (reason). examine the statement carefully and work the correct answer accoridng to the instructions given below : STATEMENT-1: For coagulation of positively charged sols, [Fe(CN)_(6)]^(4-) ion has higher coagulating power than that of PO_(4)^(3-),SO_(4)^(2-),Cl^(-) STATEMENT-2: The size of colloidal particle are larger than the size of true solution particles.

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A2Z-SURFACE CHEMISTRY-Section D - Chapter End Test
  1. Which of the following is not represented by sols?

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  2. Example of an intrinsic colloid is

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  3. colloidal solution of arsenious sulphide is coagulated by

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  4. Gold number gives

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  5. Point out the false statement

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  6. which of the following does not contain a hydrophobic structures.

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  7. The function of gum arabic in the preparation of Indian ink is

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  8. Which of the following gases is adsorbed most by activated charcoal?

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  9. Spherical gold paricles of radius 10nm, then the number of gold partic...

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  10. Which of the following forms cationic micelles above certain concentra...

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  11. In Frenudlich adsorption isotherm si proportional to pressure P as

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  12. Noble gases are adsorbed by

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  13. Adam's catalyst is

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  14. Which of the following types of metal form the most efficient catalyst...

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  15. As(2)S(3) has a negative charge. Capacity to precipate it is highest i...

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  16. Which of the following ielectrolytes is least effective in causing flo...

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  17. Ferric hydroxide sol is positively charged colloid. The coagulating po...

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  18. Assertion: According to Freundlich: x/m k.P^(1//n) Reason: The isot...

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  19. Assertion: For the coagulation of sols carrying positive charge, PO(4)...

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  20. Assertion: Physical absorption of molecular takes place on surface onl...

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